<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">北京</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hotCities" :key="item.id">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                 v-for="(item, key) of cities"
                 :key="key"
                 :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="sitem of item" :key="sitem.id">
                        {{sitem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang='stylus' scoped>
    .border-topbottom
        &:before
            border-color #ccc
        &:after
            border-color #ccc
    .list
        position absolute
        top 1.78rem
        left 0
        right 0
        bottom 0
        overflow hidden
        .title
            line-height .54rem
            background #eeeeee
            padding-left .2rem
            font-size .26rem
            color #666
        .button-list
            padding .1rem .6rem .1rem .1rem
            overflow hidden
            .button-wrapper
                float left
                width 33.33%
                .button
                    text-align center
                    margin .1rem
                    padding .1rem 0
                    border .02rem solid #ccc
                    border-radius .06rem
        .item-list
            line-height .7rem
            padding-left .2rem
</style>
